repository structure changed
Revert "repository structure changed"

This reverts commit 85d9852f39d4f11b646baefdfb703d8553ca63c4.
Revert "Repository structure changed"

This reverts commit aae13bcc9a2fccaa2dab2af19d68a97a284e2677.
Revert "SCC::topOrder() not working"

This reverts commit 4cc32198c3983bced378af27ea0f10d17c90e4e5.